A5030301161- Paleontology and Evolutionary Biology
- Ichthyology and Marine Biology
- Fish biology, ecology, and behavior
- Evolution and Paleontology Studies
- Fish Biology and Ecology Studies
- Paleontology and Stratigraphy of Fossils
- Geological formations and processes
- Geology and Paleoclimatology Research
- Plant Diversity and Evolution
- Genetic diversity and population structure
- Fish Ecology and Management Studies
- Genomics and Phylogenetic Studies
- Ecology and biodiversity studies
- Geological and Geophysical Studies Worldwide
- Parasite Biology and Host Interactions
- Physiological and biochemical adaptations
- Turtle Biology and Conservation
- Wildlife Ecology and Conservation
- Coral and Marine Ecosystems Studies
- Fossil Insects in Amber
- Aquatic and Environmental Studies
- Hydrocarbon exploration and reservoir analysis
- Craniofacial Disorders and Treatments
- Aquatic Invertebrate Ecology and Behavior
- Marine animal studies overview
Natural History Museum of Geneva
2015-2024
HES-SO Genève
2024
University of Geneva
2023
Natural History Museum
2003-2021
German Oceanographic Museum
2021
Guangxi Zhuang Autonomous Region Museum
2021
Muséum national d'Histoire naturelle
2009-2015
Unité Évolution, Écologie et Paléontologie
2014-2015
American Museum of Natural History
2014
Collège Lionel Groulx
2012
A bizarre latimeriid coelacanth fish from the Middle Triassic of Switzerland shows skeletal features deviating uniform anatomy coelacanths. The new form is closely related to a modern-looking found in same locality and differences between both are attributed heterochronic evolution. Most modified osteological structures have their developmental origin skull/trunk interface region embryo. Change expression patterning genes, specifically Pax1/9 may explain rapid evolution at coelacanth. This...
A new ginglymodian fish, Khoratichthys gibbus, gen. et sp. nov., is described based on the impression of a single articulated fish preserved sandstone slab from Late Jurassic–Early Cretaceous Phu Kradung Formation, northeastern Thailand. gibbus characterized by distinct humpbacked body with elongate posterior spines dorsal ridge scales; cheek completely covered bone; it has few infraorbitals, anterior-most one shows tiny contact orbit, and six suborbitals arranged in row; opercule...
We describe a new species of lungfish, Ferganoceratodus martini sp. nov., based on single specimen discovered in the Late Jurassic - Early Cretaceous Phu Nam Jun locality, north-eastern Thailand. The material comprises an almost complete skull roof with associated upper and lower jaws, as well some postcranial remains. F. shows characters unexpected and/or unknown other Mesozoic lungfishes, such pieces 'hard snout'. microstructure snout' provides support to Bemis Northcutt interpretation...
Spinosaurs represent a group of peculiar theropod dinosaurs that have often been described as "crocodile-mimic", predominantly fish-eating predators, and recently claimed to semi-aquatic animals.Here we report suite craniodental characters unexpectedly shared by spinosaurs pike conger eels.Pike eels are predatory, mainly piscivorous bottom-dwelling anguilliform fishes inhabit marine brackish environments.These two groups show mediolaterally compressed, elongated rostrum, terminal "rosette"...
The mid-Cretaceous vertebrate assemblage from south-eastern Morocco is one of the most diversified continental assemblages this time worldwide. bony fish component (coelacanths, lungfishes and ray-finned fishes) represented by relatively complete specimens and, mostly, fragmentary elements scattered along 250 kilometres outcrops. Here we revisit studying both isolated remains collected during several fieldtrips more material kept in public collections. comprises lungfish taxa, with first...
The vertebrate-bearing beds of the Laño quarry (Condado de Treviño) are among most relevant sites from Late Cretaceous Europe. Geologically, and adjacent region set on southern limb South-Cantabrian Synclinorium (SE Basque-Cantabrian Region, northern Iberian Peninsula). were discovered in 1984; thousands bones teeth, including microfossils, have been collected during prospection field excavation campaigns. vertebrate remains occur at two different stratigraphic horizons within a continental...
Since its usage by Darwin in 1859, the concept of 'living fossil' has undergone multiple definitions and been much discussed criticized. Soon after discovery 1938, coelacanth Latimeria was regarded as iconic example a fossil'. Several morphological studies have shown that lineage (Actinistia) not displayed critical transformation during evolutionary history molecular revealed low substitution rate for Latimeria, indicating slow genetic evolution. This statement, however, recently questioned...
Abstract: A new semionotiform fish, Isanichthys palustris gen. et sp. nov., is described from the Late Jurassic – Early Cretaceous Phu Kradung Formation, north‐east Thailand. I. known a single, nearly complete specimen found alongside abundant Lepidotes specimens at Nam Jun locality. shows mixture of semionotid‐like characters, such as pattern cheek ossifications, and lepisosteid‐like body shape dorsal fin opposed by an anal fin. possesses only some characters currently used to define...
Observed rises in taxic diversity could reflect bias of the fossil record or a genuine diversification. Here we outline new method that attempts to differentiate between these two possible explanations. The is based on calculations average ghost lineage duration through successive intervals time. Biases due variation preservational conditions affect taxa independently from their position tree life. A radiation event will some parts life more than others. During periods rapid diversification,...
Abstract Dispersal and vicariant patterns have been used as opposite concepts to explain biogeographical histories of organisms. Vicariance has preferred dispersal: the former is said be falsifiable while latter regarded a contingent hypothesis. If included in temporal framework, however, sister-group relationship between two taxa could more parsimoniously explained by dispersal event if both are not contemporaneous time. Published phylogenies various clades bony fishes compared with...
Abstract Fossil vertebrates from the Cabao Formation discovered in area of Nalut northwestern Libya include hybodont shark Priohybodus , crocodilian Sarcosuchus an abelisaurid, a baryonichine spinosaurid and large sauropod with spatulate teeth. The may be Hauterivian to Barremian age, although earlier Berriasian Valanginian age cannot excluded. Its dinosaur assemblage is reminiscent that El Rhaz Tiouraren formations Niger strongly differs both Cenomanian assemblages Morocco Egypt Late Aptian...
The osteology of the ichthyodectiform Eubiodectes libanicus (Pictet & Humbert, 1866 Pictet, F. J., and A., 1866. Nouvelles recherches sur les poissons fossiles du Mont Liban. Geneva: Georg; p. 115.[Crossref] , [Google Scholar]) from Cenomanian Lebanon is described on basis acid-prepared specimens. For comparative purposes, other putative ichthyodectiforms or discussed. We focus description hitherto poorly species such as Chiromystus mawsoni Cope, 1885 E. D., 1885. A contribution to...
Abstract: The osteology of Thaiichthys buddhabutrensis , nov. gen., from the Late Jurassic – Early Cretaceous Thailand is described on basis a collection well‐preserved specimens. mode preservation material allows describing external anatomy, as well some elements internal anatomy (braincase, vertebral column). Most cranial and postcranial skeleton shows rather conservative for ‘semionotiformes’, but jaw apparatus displays specializations. Variations observed in ossification pattern skull...
Resume : La lithostratigraphie, les paleoenvironnements et la stratigraphie sequentielle des terrains cretaces affleurant au pied meridional de l'Atlas saharien (Sud-Ouest l'Algerie), sont discutes dans le present article. Les etudes s'appuient sur l'analyse quinze coupes reparties long limites meridionale septentrionale du bassin Guir, entre Ben-Zireg, a l'Est l'axe Meridja-Boukais l'Ouest. Dans cette region, trois formations ont ete identifiees interpretees plan environnemental sequentiel...